Surel some memory issuue : load whole Surveys not onky the 25 needed.

Set debug at 2 , and look at console.log.

I have set debug to 2 in application/config/config.php as per https://manual.limesurvey.org/Optional_settings#Development_and_debugging .

Reviewed the APACHE error log (thanks to https://www.limesurvey.org/en/forum/installation-a-update-issues/62995-where-is-the-log-file). Didn't see anything written to there at the time I refresh the survey page listing. (was that where I should have looked?)

However, with debug enabled the page now does list the surveys. Takes a long time to load (~15s) but they show. Turned debug back off, surveys are again not listing. Turned debug=1, surveys list. Turned back off since apparently it's not secure to leave it on.

Strange issue ...

Agreed. Could you suggest something else for me to try, please?

Maybe look at your server log .... And try with more memory for PHP.

It is a memory issue for sure. Raise the memory_limit variable in your PHP configuration.

Would you not consider it a bug if a memory issue creates problems but no explicit errors? It makes it difficult to monitor the health of the setup and be even moderately proactive.
Also, I am a bit puzzled by the assessment... if I add debug mode the surveys become visible. Wouldn't debug mode require more resources to run, so should it not end up even more broken? Why should debug mode make the surveys visible if it were a memory issue?

The strange issue here : show something in debug mode .....

When you are loggued , try to go to this link :
http://example.org/admin/survey/sa/getSurveys_json

(update admin/survey according to the url called (look at js console to have it).

When this last happened I ended up doing a sql dump of this installation, did a new installation on a new hosting account, and imported the sql file. That worked for a while, but today I am back to exactly the same problem.

• surveys not listing on main page unless debug=2
• no errors in apache log
• /admin/survey/sa/getSurveys_json provides output, will upload file

The ...json... file I uploaded was what I get when I have debug=2
With debug = 0, I get "[HTTP/1.0 500 Internal Server Error 15283ms]" from the console.

Bit more info... during the timeframe when this started on this round we also ran out of space on our webserver for a while. There is space there now, but the problem is still there, no surveys unless debug=2
Also, our automated backups for limesurvye grew suddenly by about 6% from the day before this re-started to the day after.

Strike that... now they are not visible whether debug = 0 or 2

And:
http://example.org/admin/survey/sa/getSurveys_json
gives
<b>Fatal error</b>: Allowed memory size of 134217728 bytes exhausted (tried to allocate 547426 bytes) in <b>/home/cpdtrack/domains/cpdtracking.ca/public_html/pollsurvey/application/helpers/common_helper.php</b> on line <b>7260</b>

At least now I have something concrete to take to the hosting provider. So, again, thanks Denis for the ...json trick.

memory errors are alwas hard, because in many cases no proper error message is produce by PHP.

In 2.5 the survey list will use much less memory.

2.06+ Build 151215 released